Will this power up passive subwoofers ?

Yes, absolutely. That's the reason I bought it and it works just fine without spending a whole lot of money.

How hot does this amp run? The unit I currently use is very hot to the touch even after a short while.

This thing seems cool no issues

What is the input voltage range?

Not sure what your question is about. If you mean input power, it's spec'd. at 12-24 vdc. It comes with a power brick rated at 19 vdc, 4.47 amps. Input sensitivity is =< 280 mv...

I have a Harman Kardon reciver with a single rca sub connection. What cables do i need to hook my sub to this amp and the amp to my reciever

You need 1/8 audio plug to RCA adapter ..

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M01-BT

Q: I have a Harman Kardon reciver with a single rca sub connection. What cables do i need to hook my sub to this amp and the amp to my reciever

You need 1/8 audio plug to RCA adapter ..

Product ID: 439695414

Details

Item dimensions L x W x H
5 x 5 x 1
Manufacturer
Fosi Audio
Maximum Supply Voltage
32
Minimum Supply Voltage
24
Voltage
24

📶Bluetooth 5.0 connectivity

🔊300W max power output

🎚️Bass gain control

Description

🎵 Elevate your bass game—because your sound system deserves to be heard.

COMPACT STYLISH - Sleek 5x5 inch footprint fits effortlessly into any modern home theater setup.
TAILORED BASS CONTROL - Fine-tune your subwoofer’s output with intuitive bass gain adjustment for perfect sound.
POWERHOUSE PERFORMANCE - Unleash deep, room-filling bass with 300 watts of pure Class D amplification.
SEAMLESS BLUETOOTH 5 0 - Wirelessly stream your favorite tracks with crystal-clear, low-latency audio.
VERSATILE CONNECTIVITY - Supports both RCA and banana plug inputs for passive and powered subwoofers.

The Fosi Audio M01-BT is a compact, high-performance Class D subwoofer amplifier delivering up to 300 watts of power. Featuring Bluetooth 5.0 for wireless streaming and versatile RCA and banana plug inputs, it supports passive and powered subwoofers (not active speakers). Its bass gain control lets you customize your low-end response, making it an ideal upgrade for home theater and hi-fi audio setups.

Specifications

ASIN	B09YLMGPY2
Best Sellers Rank	#181,420 in Electronics ( See Top 100 in Electronics ) #1,079 in Audio Component Amplifiers
Brand Name	Fosi Audio
Customer Reviews	4.4 out of 5 stars 190 Reviews
Item Dimensions	5 x 5 x 1 inches
Item dimensions L x W x H	5 x 5 x 1 inches
Manufacturer	Fosi Audio
Maximum Output Power	300 watts
Maximum Supply Voltage	32 volts_of_direct_current
Minimum Supply Voltage	24 volts_of_direct_current
Model	M01-BT
Mounting Type	Freestanding
Number of Channels	1
Number of Items	1
Number of Packs	1
Package Type Name	box
Part Number	M03
Specification Met	FCC
Supply Current	4.5 A
Unit Count	1 Count
Voltage	24 volts_of_direct_current

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